# US 10,765,439 B2 · Treatment method and medical device

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- Number: US 10,765,439 B2
- Document ID: US10765439B2
- Status: Granted
- Kind: B2
- Application number: 15/425,091
- Filed: 2017-02-06
- Published: 2017-08-10
- Granted: 2020-09-08
- Earliest claimed: 2016-02-08
- Assignees: Terumo Kabushiki Kaisha
- Applicants: Terumo Kabushiki Kaisha
- Inventors: Kouhei Watanabe; Takayuki Mouri; Risa Hoshino; Akihiko Tarunaga
- Web page: https://patentgrep.com/patent/US10765439B2

## CPC

- A61B 17/22: Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
- A61B 17/221: Gripping devices in the form of loops or baskets {for gripping calculi or similar types of obstructions (surgical snare instruments A61B17/32056)}
- A61B 17/320725: {with radially expandable cutting or abrading elements (A61B17/32075 takes precedence)}
- A61M 1/60: {Containers for suction drainage, adapted to be used with an external suction source (containers not adapted for subjection to vacuum A61M1/69)}
- A61M 25/0082: {Catheter tip comprising a tool}
- A61M 25/10: Balloon catheters ({A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02;} inflatable balloons for placing stents or stent-grafts A61F2/958 {; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00})
- A61M 29/02: Dilators made of swellable material {(balloon catheters for angioplasty A61M25/104)}
- A61B 2017/00809: {Lung operations}
- A61B 2017/22051: {with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation (A61B2017/22048, A61B2017/3486 take precedence)}
- A61B 2017/22079: {with suction of debris}
- A61B 2017/320012: {Brushes}
- A61B 2217/005: with suction drainage system
- A61M 2025/0096: {being laterally outward extensions or tools, e.g. hooks or fibres}
- A61M 2025/0681: {Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube}
- A61M 2025/109: {having balloons for removing solid matters, e.g. by grasping or scraping plaque, thrombus or other matters that obstruct the flow}
- A61M 2025/1093: {having particular tip characteristics}
- A61M 2210/1035: Bronchi
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

Provided is a treatment method of being able to improve the obstruction of a biological lumen caused by stenosis of the biological lumen and the stagnation of a secretion. The treatment method includes a disposition step of disposing a dilation portion that can be dilated and deflated, and a collection portion, which is capable of removing a secretion S secreted from a biological lumen from a living body, in a stenosed site occurring in the biological lumen; a dilation step of widening the stenosed site after the disposition step by dilating the dilation portion in the stenosed site after the disposition step; and a removal step of removing the secretion from the living body by a removal portion.

## Claims

### Claim 1

A treatment method comprising:
introducing a sheath of a catheter into a biological lumen of a living body and in a direction toward a stenosed site in the biological lumen;
advancing a distal tip of the sheath from a proximal side of the stenosed site in the biological lumen through the stenosed site to a distal side of the stenosed site in the biological lumen;
positioning, while a portion of the sheath is disposed in the stenosed site, a shaft disposed inside a lumen of the sheath at a postion of the stenosed site;
withdrawing the sheath from the stenosed site while maintaining the shaft in the position of the stenosed site, wherein withdrawing the sheath exposes a portion of the shaft form the lumen of the sheath such that i) a dilation balloon portion of the shaft is arranged in the stenosed site, ii) a removal portion of the shaft comprising a plurality of protruding portuions is disposed on the distal side of the stenosed site, and iii) the sheath is disposed on the proximal side of the stenosed site, and wherein the plurality of protruding portions are capable of removing a secretion secreted from the biological lumen in the stenosed site;
widening the stenosed site by dilating the dilation balloon portion of the shaft while arranged in the stenosed site;
deflating the dilation balloon portion of the shaft while arranged in the stenosed site; and
removing the secretion from the biological lumen by moving the plurality of protruding portions from the distal side of the stenosed site into contact with the secretion in the stenosed site entrapping the secretion in the plurality of protruding portions and then moving the plurality of protruding portions and the secretion entrapped therein from the stenosed site to the proximal side of the stenosed site.

### Claim 2 (depends on 1)

The treatment method according to claim 1, wherein in the removal step, the secretion is removed from the living body with an operation of extracting the removal portion from the living body through the lumen of the sheath.

### Claim 3 (depends on 2)

The treatment method according to claim 2, wherein the secretion is collected in between the plurality of protruding portions as the plurality of protruding portions are moved from the distal side of the stenosed site to the proximal side of the stenosed site.

### Claim 4 (depends on 3)

The treatment method according to claim 3, wherein an exterior surface of the dilation balloon portion of the shaft is coated with a medicine capable of widening the stenosed site upon dilation of the dilation balloon portion of the shaft moving the exterior surface of the dilation balloon portion into contact with the stenosed site.

### Claim 5 (depends on 4)

The treatment method according to claim 4, wherein the biological lumen is a bronchus.

### Claim 6 (depends on 1)

The treatment method according to claim 1, wherein the secretion is collected in between the plurality of protruding portions as the plurality of protruding portions are moved from the distal side of the stenosed site to the proximal side of the stenosed site.

### Claim 7 (depends on 1)

The treatment method according claim 1, wherein an exterior surface of the dilation balloon portion of the shaft is coated with a medicine capable of widening the stenosed site upon dilation of the dilation balloon portion of the shaft moving the exterior surface of the dilation balloon portion into contact with the stenosed site.

### Claim 8 (depends on 2)

The treatment method according claim 2, wherein an exterior surface of the dilation balloon portion of the shaft is coated with a medicine capable of widening the stenosed site upon dilation of the dilation balloon portion of the shaft moving the exterior surface of the dilation balloon portion into contact with the stenosed site, and wherein the plurality of protruding portions are impregnated with the medicine.